An investigation of the strain-mediated ME effect in CoFe₂O₄/BaTiO₃ 0-0 type composite film

【作者】 沙磊； 苗君； 姜勇；

【机构】 材料科学与工程学院,北京科技大学；

【摘要】 <正>There are increasing research work focused on improving magnetoelectric（ME） effect in composite multiferroic film,such as vertical nanostructure（1-3 configuration） with CoFe₂O₄（ferromagnetic）nanopillars embedded in a BaTiO₃（ferroelectric） matrix.However,it is hard for 1-3 nanostructures to control the distribution ordering and expand its variety.A new structure:multilayered nanodot arrays（0-0 composite）were proposed to obtain great ME coupling effect,stacking,and order control simultaneously.In this study,a phase-field approach was used to simulate the switching of magnetization direction by application of extra electric field in CoFe₂O₄/BaTiO₃ 0-0 composite film.The simulation agrees well with the experiment result.And the effect of array size and dot shape were studied which give a deep understanding of strain-mediated ME effect and provide scientific guidance for future application.更多还原

【Abstract】 There are increasing research work focused on improving magnetoelectric（ME） effect in composite multiferroic film,such as vertical nanostructure（1-3 configuration） with CoFe₂O₄（ferromagnetic）nanopillars embedded in a BaTiO₃（ferroelectric） matrix.However,it is hard for 1-3 nanostructures to control the distribution ordering and expand its variety.A new structure:multilayered nanodot arrays（0-0 composite）were proposed to obtain great ME coupling effect,stacking,and order control simultaneously.In this study,a phase-field approach was used to simulate the switching of magnetization direction by application of extra electric field in CoFe₂O₄/BaTiO₃ 0-0 composite film.The simulation agrees well with the experiment result.And the effect of array size and dot shape were studied which give a deep understanding of strain-mediated ME effect and provide scientific guidance for future application.更多还原